1,000 horsepower
A1A-A1A trucks
Weight – 238,000 lbs.
Tractive effort – 30,000 lbs.
A1A-A1A trucks were reused to re-truck RS-18s to create RSC-14 Nos. 1750 -1787
| Road no. | Class | Build date | Builder’s no. | Retired | Notes / disposition | ||
| 1700 | MR-10a | Jun 55 | 81188 | May 20 76 | |||
| 1701 | MR-10a | Jun 55 | 81189 | May 6 76 | |||
| 1702 | MR-10a | 1955 | 81190 | Jul 16 75 | |||
| 1703 | MR-10a | 1955 | 81191 | Oct 8 75 | |||
| 1704 | MR-10a | Aug 55 | 81192 | Feb 26 76 | |||
| 1705 | MR-10b | Nov 55 | 81267 | Jan 20 76 | |||
| 1706 | MR-10b | 1955 | 81268 | Nov 13 75 | |||
| 1707 | MR-10b | Dec 55 | 81269 | Jan 13 76 | |||
| 1708 | MR-10b | Dec 55 | 81270 | Jul 11 75 | |||
| 1709 | MR-10b | Dec 55 | 81476 | Apr 21 76 | |||
| 1710 | MR-10b | Feb 56 | 81477 | Mar 31 76 | |||
| 1711 | MR-10c | Nov 56 | 81634 | Apr 13 76 | |||
| 1712 | MR-10c | Nov 56 | 81635 | Nov 21 75 | |||
| 1713 | MR-10c | Nov 56 | 81626 | Aug 25 75 | |||
| 1714 | MR-10c | Nov 56 | 81637 | Nov 24 75 | |||
| 1715 | MR-10c | Nov 56 | 81638 | Jul 15 75 | |||
| 1716 | MR-10c | Dec 56 | 81641 | Jul 25 75 | |||
| 1717 | MR-10c | Dec 56 | 81642 | May 12 76 | |||
| 1718 | MR-10c | Dec 56 | 81643 | Feb 26 76 | |||
| 1719 | MR-10c | 81644 | Nov 7 75 | ||||
| 1720 | MR-10c | 81645 | May 4 76 | ||||
| 1721 | MR-10c | 81646 | Aug 20 75 | ||||
| 1722 | MR-10c | 81647 | Sep 9 75 | ||||
| 1723 | MR-10c | Jan 57 | 81648 | Oct 29 75 | |||
| 1724 | MR-10c | Jan 57 | 81649 | Apr 13 76 | |||
| 1725 | MR-10c | Jan 57 | 81650 | May 20 76 | |||
| 1726 | MR-10c | Nov 56 | 81639 | Jul 16 75 | |||
| 1727 | MR-10c | Dec 56 | 81640 | Jan 23 76 | |||
| 1728 | MR-10c | Jan 57 | 81651 | Mar 17 76 | |||
| 1729 | MR-10c | Jan 57 | 81652 | Sep 24 75 | |||
| 1730 | MR-10d | Oct 57 | 82128 | Oct 8 75 | |||
| 1731 | MR-10d | Oct 57 | 82129 | Dec 8 75 | |||
| 1732 | MR-10d | 1957 | 82130 | Dec 16 75 | |||
| 1733 | MR-10d | Nov 57 | 82131 | Oct 8 75 | |||
| 1734 | MR-10d | Nov 57 | 82132 | Dec 15 75 |